A:
Positive:
1 x 1554403137 x 2220575943 x 3614891101 x 1539013301 x 516413707 x 2198594343 x 357915113 x 30401
Negative:
-1 x -155440313-7 x -22205759-43 x -3614891-101 x -1539013-301 x -516413-707 x -219859-4343 x -35791-5113 x -30401
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 155,440,313, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 155,440,313 | |
| -1 | -155,440,313 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,440,313.
Example:
1 x 155,440,313 = 155,440,313
and
-1 x -155,440,313 = 155,440,313
Notice both answers equal 155,440,313
With that explanation out of the way, let's continue. Next, we take the number 155,440,313 and divide it by 2:
155,440,313 ÷ 2 = 77,720,156.5
If the quotient is a whole number, then 2 and 77,720,156.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 155,440,313 | |
| -1 | -155,440,313 |
Now, we try dividing 155,440,313 by 3:
155,440,313 ÷ 3 = 51,813,437.6667
If the quotient is a whole number, then 3 and 51,813,437.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 155,440,313 | |
| -1 | -155,440,313 |
Let's try dividing by 4:
155,440,313 ÷ 4 = 38,860,078.25
If the quotient is a whole number, then 4 and 38,860,078.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 155,440,313 | |
| -1 | 155,440,313 |
If you did it right, you will end up with this table:
| 1 | 7 | 43 | 101 | 301 | 707 | 4,343 | 5,113 | 30,401 | 35,791 | 219,859 | 516,413 | 1,539,013 | 3,614,891 | 22,205,759 | 155,440,313 |
| -1 | -7 | -43 | -101 | -301 | -707 | -4,343 | -5,113 | -30,401 | -35,791 | -219,859 | -516,413 | -1,539,013 | -3,614,891 | -22,205,759 | -155,440,313 |
Here are some more numbers to try:
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